WO1997024219A1 - Procede et appareil de fabrication d'un recipient tubulaire - Google Patents

Procede et appareil de fabrication d'un recipient tubulaire Download PDF

Info

Publication number
WO1997024219A1
WO1997024219A1 PCT/JP1996/003833 JP9603833W WO9724219A1 WO 1997024219 A1 WO1997024219 A1 WO 1997024219A1 JP 9603833 W JP9603833 W JP 9603833W WO 9724219 A1 WO9724219 A1 WO 9724219A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
thin
walled
layer
walled tube
Prior art date
Application number
PCT/JP1996/003833
Other languages
English (en)
Japanese (ja)
Inventor
Yasuyuki Imaizumi
Original Assignee
Yoshino Kogyosho Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yoshino Kogyosho Co., Ltd. filed Critical Yoshino Kogyosho Co., Ltd.
Priority to JP52418997A priority Critical patent/JP3992739B2/ja
Priority to DE69634356T priority patent/DE69634356T2/de
Priority to US08/894,713 priority patent/US5980808A/en
Priority to CA002214075A priority patent/CA2214075C/fr
Priority to AU12090/97A priority patent/AU721718B2/en
Priority to EP96943314A priority patent/EP0812675B1/fr
Publication of WO1997024219A1 publication Critical patent/WO1997024219A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B29C57/10—Closing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/023—Half-products, e.g. films, plates
    • B29B13/024—Hollow bodies, e.g. tubes or profiles
    • B29B13/025—Tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D23/00—Producing tubular articles
    • B29D23/20—Flexible squeeze tubes, e.g. for cosmetics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/20—Flexible squeeze tubes, e.g. for cosmetics

Definitions

  • the present invention relates to a method and an apparatus for manufacturing a tube container in which a tube container having a mouthpiece is integrally formed from a thin-walled tube formed of a thermoplastic resin.
  • a heater is inserted into the inside of the thin-walled tube, and the heated air is released to the inner wall of the thin-walled tube to soften the inside of the tip of the thin-walled tube and then heated.
  • a method of forming a mouthpiece from the inside of the thin-walled tube using compression molding means is known. is there.
  • the conventional technology does not have a shape change prevention means to prevent the shape change of the thin-walled tube, and discharges heated air. The gas was discharged outward toward the inner wall surface of the thin-walled tube, and flowed away from the head formation. As a result, the heated thin-walled tube expanded outward and changed its appearance.
  • the present invention has been made in view of such problems of the related art, and can be formed into a desired tube shape, can be formed to have a small thickness at a shoulder portion of the tube, and can improve work efficiency.
  • An object of the present invention is to provide a method and an apparatus for manufacturing a tube container which can be achieved.
  • a decoration such as a marble pattern
  • the marble pattern is applied by printing after forming the tube container.
  • ADVANTAGE OF THE INVENTION when manufacturing a tube container, a marble pattern can also be provided to a shoulder part.
  • the present invention employs the following means in order to solve the above problems.
  • the present invention relates to a method of manufacturing a tube container having a mouthpiece portion to which a cap is attached from a thin-walled tube formed of a thermoplastic resin, wherein a head forming portion for molding the mouthpiece portion is provided.
  • the heated air is released to the inner wall surface at the end of the thin tube and is forcibly sucked in the direction away from the male mold, and the outer wall surface at the end of the thin tube is cooled to provide a space between the inside and the outside of the thin tube.
  • a third step in which heated air is released to the outer wall surface at the end of the thin-walled tube and forcedly sucked in a direction away from the male mold to shrink the tip of the thin-walled tube and make it adhere to the third step;
  • the heated air that heated the inner wall of the thin tube is forcibly removed by suction, the parts that do not need to be heated are not heated, and at the same time, the outer wall of the thin tube is cooled and the expansion and deformation is regulated.
  • the shape of the thin tube can be maintained before and after heating.
  • the heated air is forcibly removed by suction, so that parts that do not require heating are not heated. Therefore, the softened portion for forming the mouthpiece can be made to have a constant volume, and the shoulder of the tube container can be made.
  • the wall thickness of the portion can be reduced to a desired thickness, and can be formed into a desired tube shape.
  • the spout for discharging the contents may be formed by compressing and molding the mouthpiece and the shoulder at the same time as drilling the spout in the mouthpiece.
  • the molding may be performed in a closed state, and a spout may be separately formed after the molding.
  • the thin tube may be a laminated tube having two or more layers, or may be a single-layer tube.
  • the thin tube has a three-layer structure in which an intermediate layer is sandwiched between an outer layer and an inner layer, and the material forming the intermediate layer is different from the material forming the outer layer and the inner layer.
  • the thickness of the inner layer may be greater than the thickness of the outer layer.
  • the thickness of the inner layer thicker than the thickness of the outer layer, molding failure of the tube container during compression molding of the mouthpiece can be prevented.
  • the thin tube has a three-layer structure in which an intermediate layer is sandwiched between an outer layer and an inner layer, and the material forming the intermediate layer is different from the material forming the outer layer and the inner layer.
  • the fluidity of the material forming the inner layer may be better than the fluidity of the material forming the outer layer.
  • the thin tube has a three-layer structure in which an intermediate layer is sandwiched between an outer layer and an inner layer, and the material forming the intermediate layer is different from the material forming the outer layer and the inner layer.
  • the thickness of the inner layer is greater than the thickness of the outer layer-
  • the fluidity of the material forming the inner layer may be better than the fluidity of the material forming the outer layer.
  • the thickness of the inner layer thicker than the thickness of the outer layer, molding failure of the tube container during compression molding of the mouthpiece can be prevented.
  • the fluidity of the material forming the inner layer is made different from the fluidity of the material forming the outer layer, and the fluidity of the material forming the inner layer is changed to the fluidity of the material forming the outer layer.
  • the present invention relates to an apparatus for manufacturing a tube container having a mouthpiece to which a cap is attached from a thin tube formed of a thermoplastic resin,
  • the heated air is released to the inner wall surface at the tip of the thin tube, the outer wall at the tip of the thin tube is cooled, and the heated air after heating the inner wall is sucked in a direction away from the thin tube in the axial direction.
  • An internal heater An internal heater
  • External heating 3 ⁇ 4 ⁇ that discharges heated air to the outer wall surface at the tip of the thin-walled tube and sucks the heated air after heating the outer wall surface in a direction away from the thin-walled tube in the axial direction;
  • a female die that cooperates with the male die of the tube holder to sandwich the end of the thin-walled tube and compression-molds it into the mouthpiece and shoulder.
  • the manufacturing apparatus includes a punch for forming a spout in the barrel portion when the end portion of the thin-walled tube is compression-molded into the barrel portion and the shoulder portion by the male mold and the female mold of the tube holder. May be provided.
  • the above-mentioned internal heater of the tube container manufacturing apparatus has an annular cooling section for cooling the outer wall surface at the distal end of the thin-walled tube, and an annular gap between the cooling section inside the cooling section. And a heated air suction passage connected to the annular gap, the tip of the thin tube held by the tube holder in the annular gap between the cooling unit and the heating unit.
  • the heating section is provided with a heating air passage therein, and a heating air discharge port is provided at a portion facing the cooling section with the thin tube interposed therebetween. You may.
  • the external heater of the above tube container manufacturing apparatus has an annular heating section having a heated air passage therein, and a thin tube held by the tube holder inside the heating section.
  • the heating air suction passage is connected inside the heating section, and a heating air discharge port is provided on the inner wall surface of the heating section that faces the tip of the inserted thin-walled tube. It may be.
  • a raw material of the thin tube of the present invention for example, an adhesive polyethylene and a resin having a gas barrier property such as an ethylene vinyl alcohol copolymer can be used.
  • the raw material of the thin-walled tube is not limited to the above example.
  • the present invention relates to a method for producing a tube container provided with a cap portion equipped with a cap from a thin laminated tube formed of a thermoplastic resin and having an elliptical cross-sectional shape,
  • the tube holder provided with a head forming part for molding the mouthpiece is provided with A first step of attaching a thin-walled tube and mounting the thin-walled tube such that the tip of the thin-walled tube protrudes from the tip of the tube holder by a predetermined dimension;
  • the heated air is released to the inner wall surface at the end of the thin tube and is forcibly sucked in the direction away from the male mold, and the outer wall surface at the end of the thin tube is cooled to provide a space between the inside and the outside of the thin tube.
  • a third step in which heated air is released to the outer wall surface at the end of the thin-walled tube and forcedly sucked in a direction away from the male mold to shrink the tip of the thin-walled tube and make it adhere to the third step;
  • a method of adding a marble pattern to a tube container characterized by having the following.
  • the distal end of the thin-walled tube is shrunk inward and folded.
  • the tip is compression-molded into the mouthpiece and the shoulder, so that in the folded portion, the phases of the inner and outer layers are shifted, overlapped, and displaced. Is stretched and thinned. In the portion where the outer layer becomes thinner, the intermediate layer or the inner layer can be seen through, and a muffle pattern along the generatrix direction is exhibited.
  • FIG. 1 is a front view of a thin-walled tube used in the first embodiment of the present invention.
  • FIG. 2 is a front view of the tube holder used in the first step in the first embodiment of the present invention.
  • FIG. 3 is a cross-sectional view showing a state where a thin tube is mounted on a tube holder in the first embodiment of the present invention.
  • FIG. 4 is a cross-sectional view of the internal heater according to the first embodiment of the present invention.
  • FIG. 5 is attached to the tube holder after the heat treatment in the second step according to the first embodiment of the present invention. It is sectional drawing of a thin tube.
  • FIG. 6 is a sectional view of the external heater according to the first embodiment of the present invention.
  • FIG. 7 is a front view of the thin-walled tube mounted on the tube holder immediately after the heat treatment in the third step according to the first embodiment of the present invention.
  • FIG. 8 is a front view of the thin-walled tube mounted on the tube holder after the heat treatment in the third step according to the first embodiment of the present invention.
  • FIG. 9 is a cross-sectional view of a male mold showing a state before molding of a mouthpiece in a fourth step in the first embodiment of the present invention.
  • FIG. 10 is a cross-sectional view of the tube holder and the male mold showing a state at the time of forming the barrel portion in the fourth step in the first embodiment of the present invention.
  • FIG. 11 is a cross-sectional view of the tube holder and the male mold showing a state after the molding of the barrel portion in the fourth step in the first embodiment of the present invention.
  • FIG. 12 is a cross-sectional view of a tube container formed according to the first embodiment of the present invention.
  • FIG. 13 is a longitudinal sectional view of a thin tube used in the first and second embodiments of the present invention.
  • FIG. 14 shows a tube container manufactured according to the third embodiment of the present invention.
  • FIG. 15 is a partial front view of the shoulder portion and the mouthpiece portion of the tube container manufactured according to the third embodiment of the present invention.
  • FIG. 16 is a partial cross-sectional view taken along line AA in FIG.
  • FIG. 17 is a partial front view of the thin tube mounted on the tube holder after the heat treatment in the third step in the third embodiment of the present invention.
  • the tube container 1 includes a housing body 3 formed by thermoforming a flexible cylindrical resin, and a mouthpiece 5 formed by compressing the resin by a compression molding method.
  • the housing body 3 is composed of a straight body 7 and a tapered shoulder 9.
  • the mouthpiece 5 has a spout 11 at the end for discharging contents (not shown) to the outside, and a thread 13 for attaching a cap or the like is provided on the outer wall surface of the mouthpiece 5. .
  • the tube container 1 is integrally formed from a thin tube 15 as a material. As shown in FIG. 1, the thin-walled tube 15 was stretched and extruded after heating an adhesive polyethylene and a resin having a gas barrier property such as an ethylene-vinyl alcohol copolymer. It is cylindrical and cut to a certain length.
  • the thin-walled tube 15 can have a single-layer structure or a multilayer structure.
  • the thin-walled tube 15 can have a three-layer structure in which an intermediate layer 65 is sandwiched between an outer layer 61 and an inner layer 63.
  • the present invention is not limited to a three-layer structure.
  • a known resin material used for manufacturing a tube container can be used, and for example, a polyethylene (PE), polypropylene (PP), or the like having printability can be used. It is not limited to these.
  • a known resin material having desired physical properties can be used for the inner layer 63 and the intermediate layer 65.
  • a resin having gas barrier properties can be used for the inner layer 63 or the intermediate layer 65.
  • the resin having gas barrier properties include ethylene vinyl alcohol copolymer (EV0H), polyethylene terephthalate (PET), and PETG (polyethylene terephthalate resin). Thermoplastic polyphenylene ester whose part is substituted by 1,4-cyclohexanedimethanol) and polybutylene terephthalate (PBT).
  • a resin having a non-adsorbing property can be used for the inner layer 63.
  • the non-adsorbing resin include non-adsorbing PET.
  • Adhesive resins include, for example, adhesive polyethylene, such as Adima (trade name) of Mitsui Oil Co., Ltd. and Modic (trade name) of Mitsubishi Chemical Corporation. It is not limited. When an adhesive resin is not used, a known adhesive can be used.
  • a two-layer structure of an adhesive polyethylene and EV0H is also included in the present invention, and an adhesive comprising a non-adhesive polyethylene and an adhesive
  • the present invention also includes a three-layer structure of a layer and EVOH.
  • the present invention also includes a five-layer structure including polyethylene, an adhesive, EV0H, an adhesive, and polyethylene.
  • the cross-sectional shape of the thin tube 15 may be a perfect circle or an ellipse.
  • FIG. 2 A first embodiment of a tube container manufacturing apparatus directly used for carrying out the method invention according to the present invention will be described with reference to FIG. 2, FIG. 4, FIG. 6, and FIG.
  • the tube container manufacturing apparatus includes a tube holder 17, an internal heater 23, an external heater 25, a female mold 27, and a perforator 29.
  • the tube holder 1 ⁇ holds the thin-walled tube 15 and compression-molds the mouthpiece 5 and the tapered shoulder 9, and is composed of a tube holder body 31 and a male mold 16.
  • the male mold 16 and the tube holder body 31 have the same circular cross section as the thin tube 15, and the male mold 16 can be moved relative to the tube holder body 31 at the tip of the tube holder body 31. It is provided.
  • the thin tube 15 is attached to the tube holder body 31 of the tube holder 17 with its tip protruding a predetermined dimension from the tip of the tube holder 17.
  • the internal heater 23 heats the inner wall 19 of the thin-walled tube 15 and cools the outer wall 21, and creates a temperature difference between the inside and the outside of the thin-walled tube 15 while maintaining the inner wall 19.
  • the internal heater 23 includes an annular cooling section 33 for cooling the outer wall 21 of the distal end 15 a of the thin-walled tube 15, and this cooling section.
  • a heating section 37 having an annular gap 35 inside the section 33 and a heated air suction passage 39 connected to the annular gap 35 are provided.
  • the cooling section 33 includes a circulating section 41 for constantly circulating a coolant such as water therein, and a cooling surface 43 for cooling the outer wall surface 21 of the thin-walled tube 15. Is brought into contact with the outer wall surface 21 of the thin tube 15 to cool the outer wall surface 21 of the thin tube 15.
  • the heated air suction passage 39 connected to the gap 35 communicates with a heated air suction means (not shown) to suck heated air in a direction away from the distal end 15 a of the thin tube 15.
  • the external heater 25 heats the outer wall surface 21 of the distal end portion 15a of the thin-walled tube 15 and, as shown in FIG. 6, has an annular shape in which a heated air passage 47 is provided.
  • the tip 15 a of the thin-walled tube 15 held by the tube holder 1 ⁇ can be inserted into the inside of the heating section 49.
  • a heated air suction passage 51 is connected to the inside, and a heated air discharge port 53 is provided at a position opposite to the inserted thin-walled tube 15 across the distal end 15a.
  • the female mold 27 includes a first mold 55 having a cavity 55 a having a shape corresponding to the outer shape of the taper shoulder 9 of the tube container 1, and a first mold 55.
  • a second mold 57 having a cavity 57 a which is located below 55 and has a shape corresponding to the outer shape of the mouthpiece 5 is provided.
  • Below the second mold 57 the perforator 29 forming the spout 11 in the mouthpiece 5 is provided. You.
  • the perforator 29 is urged upward in FIG. 9 by an elastic means such as a spring, so that the end 15 b of the thin-walled tube 15 is simultaneously formed with the compression molding by the cooperation of the male type 16 and the female type 27.
  • a spout 11 is pierced in the barrel 5.
  • the thin-walled tube 15 as a raw material of the tube container 1 is arranged on the outer periphery of the tube holder 17, and its end is axially outward by a certain distance from the front end of the male mold 16. It is mounted protruding.
  • the male mold 16 can move the inside of the thin tube 15 in the axial direction of the tube holder 1 ⁇ ⁇ even if the thin tube 15 is attached to the tube holder 17.
  • the second step of softening the inner wall surface 19 of the thin tube 15 will be described with reference to FIGS.
  • the temperature and time of the heated air are different depending on the inner wall surface 19 of the thin tube 15.
  • the temperature of the heated air is not limited to the force ⁇ described in the embodiment described below.
  • the heating time is not limited to the examples described later. However, if the temperature of the heated air is too high, the resin may be melted. Therefore, it is preferable to adjust the heating time to adjust the degree of heating.
  • Cooling is performed by absorbing heat from the outer wall surface 21 of the thin-walled tube 15 in contact with the cooling surface 43 by constantly circulating a coolant such as water through the circulation portion 41.
  • a coolant such as water
  • the distal end portion 15a of the thin-walled tube 15 in which the inner wall surface 19 of the thin-walled tube 15 is subjected to the vulcanization treatment is thickened and contracted in length, as shown in FIG. This is because the heating section 37 is heated at a temperature exceeding the glass transition point of the elongated and extruded thin-walled tube 15 and instantaneously shrinks to the original shape due to the memory phenomenon. I think that the.
  • the contracted distal end 15a of the thin tube 15 provides a resin having a certain volume required for forming the mouthpiece 5 and the tapered shoulder 9 formed according to the present invention.
  • a third step of softening the outer wall surface 21 of the distal end portion 15a of the thin tube 15 will be described with reference to FIGS.
  • the temperature and time of the heated air may be any temperature and time sufficient to soften the distal end 15a of the thin tube 15.
  • the temperature of the heated air is not limited to the force ⁇ described in Examples described later.
  • the heating time is also described in Examples below, but is not limited thereto. However, if the temperature of the heated air is too high, the resin may be melted. Therefore, it is preferable to adjust the heating time to adjust the degree of heating.
  • the distal end portion 15b of the thin-walled tube 15 whose outer wall surface 21 was heat-treated was deformed to the inside of the thin-walled tube 15 as shown in FIG. 7, and then shrunk by heat shrinkage as shown in FIG. In close contact.
  • the shrunken and intimate portion provides a fixed volume of resin for molding the barrel 5 and taper shoulder 9.
  • the range in which the external heating is performed depends on the volume for forming the barrel 5 and the tapered shoulder 9.
  • the present invention is not limited to this.
  • the thin-walled tube 15 was made of an adhesive polyethylene and an EVOH copolymer having gas barrier properties, and had a wall thickness of 0.5.
  • the outer and inner layers consisted of adhesive polyethylene and the middle layer consisted of EV0H.
  • the diameter of the thin tube 15 was 19 bandits.
  • the operating conditions of the internal heater 23 are as follows.
  • the temperature of the heated air is 380 degrees Celsius
  • the air pressure of the heated air is 0.08 MPa (the air flow rate of the heated air is 410 Nl / min)
  • the suction force of the heated air after heating is 330 Nl / min Met.
  • the heating time was 1 second.
  • the operating conditions of the external heater 25 are as follows.
  • the temperature of the heated air is 300 degrees Celsius
  • the air pressure of the heated air is 0.09 MPa (the air flow rate of the heated air is 380 Nl / min)
  • the suction force of the heated air after heating is 350 Nl / min
  • the water volume in the cooling section was 2.2 1 / min.
  • the heating time was 4 seconds.
  • the heating range was 15 mm from the end of the tube.
  • Example _2 to 5 The tube container 1 was molded using the thin-walled tube 15 having the configuration shown in Table 1. Table 1 shows the use conditions of the internal heater 23 and the external heater 25 in each embodiment.
  • the second embodiment of the present invention relates to the thickness and physical properties of each layer when the thin-walled tube 15 has three layers. Since the manufacturing method and the manufacturing apparatus are the same as described above, the description is omitted. I do.
  • the present applicant manufactured the tube container 1 by changing the thickness and fluidity of the resin material of each layer of the three-layered thin tube 15 variously. It was found to have a significant effect on the incidence. This will be described with reference to the experimental results in Tables 2 and 3.
  • the outer layer 61 and the inner layer 63 are made of the same material of adhesive polyethylene, and the middle layer 65 is made of EV0H.
  • the fluidity is represented by the value of the melt index (hereinafter referred to as MI).
  • MI melt index
  • This MI is obtained from an orifice having a specified diameter and length at a constant temperature and pressure. It is a value that extrudes the molten material, weighs it, and converts it to grams per 10 minutes.
  • the measurement method was in accordance with ASTM-D-1238. In general, the larger the MI, the better the fluidity and workability during melting, and the lower the tensile strength and stress cracking resistance.
  • the term “defect” refers to a case where a projection is generated on a shoulder portion during molding, a screw portion is missing, or a spout is not opened.
  • the number of samples for each experiment number is 50 ( Table 2).
  • the outer layer 61 and the inner layer 63 have the same thickness d3 and dl, and the fluidity of the resin material of the outer layer 61 and the inner layer 63. It can be seen that many defects occur in the tube container 1 to be molded when the same is used.
  • the term “weld mark” refers to a line-shaped unevenness at the joint portion of the thermoplastic resin.
  • the joint portion is formed. causes linear unevenness. If this unevenness is conspicuous, the commercial value of the molded product will be reduced. Further, even if the unevenness is not conspicuous, the strength in the direction perpendicular to the weld mark is considerably lower than that of the part without the weld mark, and stress corrosion cracking is easily caused.
  • the criteria for the non-defective rate are the same as the criteria for the non-defective rate in Table 2c .
  • the number of samples for each experiment number is 100.
  • the shoulder portion of the tube container 1 can be provided with a marble pattern.
  • a marble pattern as shown in FIGS. 14 and 15 can be formed at the same time when the shoulder portion and the mouthpiece portion of the tube container 1 are formed.
  • each layer is colored using a thin-walled tube 15 having a multilayer structure. For example, if a white container has a pink marble pattern, the outer layer is colored white and the middle and / or inner layers are colored pink. Known coloring materials can be used.
  • the cross-sectional shape of the thin tube is elliptical.
  • the outer wall 21 of the thin tube 15 is heated by the heater 49, and the heated air that has collided with the outer wall 21 is heated.
  • the air is sucked and discharged through the air suction passage 51.
  • the heated air collides and is sucked and discharged, so the tip 15a of the thinned thin tube 15 is exposed to the positive pressure due to the heated air collision and the non-pressure due to the suction and discharge.
  • the cross-sectional shape of the thin tube is elliptical. Therefore, the degree of contraction in the long side direction is larger than the degree of contraction in the short side direction. For this reason, as shown in FIG. 16, the tip 15b has an irregular shape as if it were folded in the radial direction.
  • the fourth step is performed. That is, as described above, the male mold 16 is lowered with respect to the tube holder 17, and in cooperation with the female mold 27, the distal end 15 b of the thin-walled tube 15 is sandwiched between the mouth part 5 and the tapered shoulder. Compression molded to part 9. At this time, since the folded portion is pressed, the inner and outer layers are out of phase, overlap, resin flow, and displacement occur in the folded portion. As a result, the outer layer is stretched, and a thinned portion is formed at a position extending from the mouthpiece along the peripheral edge of the shoulder. In this thinned part, the intermediate layer or the inner layer is seen through. Therefore, the shoulder portion, becomes the color of the intermediate layer may show through the irregular along the generatrix direction, c Example 5 this is a amorphous marble pattern along the generatrix direction
  • the thin-walled tube 15 has a three-layer structure, the outer layer is made of adhesive polyethylene, the middle layer is made of EV0H, and the inner layer is made of adhesive polyethylene. Become. The outer layer was colored white. On the other hand, the inner layer was colored pink. The intermediate layer was not colored. The total thickness was 0.5 ⁇ . The major axis of the tube container 15 was 30 mni, and the minor axis was 20 mm.
  • the operating conditions of the internal heater 23 are as follows.
  • the temperature of the heated air was 375 degrees Celsius
  • the air flow rate of the heated air was 410 Nl / min
  • the suction power of the heated air after heating was 300 Nl / min
  • the water volume in the cooling section was 2.2 1 / rain.
  • the operating conditions of the external heater 25 are as follows.
  • the temperature of the heated air was 400 degrees Celsius
  • the air flow rate of the heated air was 380 Nl / min
  • the suction power of the heated air after heating was 400 Nl / min.
  • the external heating time was 4 seconds.
  • the heating range was 22 mm from the end of the tube.
  • the heated air after heating is sucked in a direction away from the thin tube, and the outer wall surface of the thin tube is cooled.
  • the shape change of the thin tube after heating can be prevented, and the subsequent steps can be smoothly performed.
  • the heated air after heating is sucked in the direction away from the thin-walled tube, so that the portion that cannot be heated is not heated, so the softened portion is kept at a certain amount.
  • the thickness of the taper shoulder of the tube container can be reduced.
  • a tube container having a desired shape can be obtained.
  • a tube container is manufactured directly from a thin-walled tube, a parting line does not occur in the tube container. Therefore, according to the present invention, printing on a tube container becomes easy. Further, according to the present invention, a tube container is manufactured while preventing a shape change of a thin-walled tube after heating. It is possible to print on a thin-walled tube in advance and then mold only the mouthpiece and shoulder.
  • the inner layer is made thicker than the outer layer, or the fluidity of the material forming the inner layer is reduced.
  • a shoulder portion when manufacturing the tube container, a shoulder portion can also be provided with a mable pattern.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Tubes (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)

Abstract

On forme une épaule à paroi fine dans un récipient tubulaire sans changer ni l'apparence ni la forme dudit récipient tubulaire et en augmentant l'efficacité du travail lorsque le col et le corps du récipient tubulaire font l'objet d'un moulage d'une pièce. L'invention concerne un procédé de fabrication d'un récipient tubulaire (1) qui consiste premièrement à fixer un tube à paroi fine (15) à un porte tube (17), deuxièmement à assouplir l'intérieur de l'extrémité (15a) du tube à paroi fine (15), troisièmement à rétrécir l'extrémité du tube à paroi fine (15) de façon à créer un contact rapproché, et quatrièmement à mouler une partie correspondant au col (5) et une partie correspondant à l'épaule (9) au moyen d'un moule mâle (16) associé à l'extrémité du tube à paroi fine (15). Etant donné que de l'air chaud est aspiré après que le tube à paroi fine (15) ait été chauffé et après que la surface externe de la paroi ait été refroidie, on peut mettre en oeuvre, en douceur, les processus ultérieurs et on peut en outre mouler une partie correspondant à l'épaule (9), à paroi fine et effilée, sans changer ni l'apparence ni la forme du récipient tubulaire (1). Il est également possible d'appliquer à la partie correspondant au col et à la partie correspondant à l'épaule du récipient un motif marbré, simultanément à l'opération de moulage du récipient tubulaire (1).
PCT/JP1996/003833 1995-12-28 1996-12-26 Procede et appareil de fabrication d'un recipient tubulaire WO1997024219A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP52418997A JP3992739B2 (ja) 1995-12-28 1996-12-26 チューブ容器の製造方法と製造装置
DE69634356T DE69634356T2 (de) 1995-12-28 1996-12-26 Verfahren und vorrichtung zum herstellen von rohrfoermigen behaeltern
US08/894,713 US5980808A (en) 1995-12-28 1996-12-26 Method and apparatus for producing a tubular container while maintaining a shoulder section thereof at a desired thickness, and method for producing a marbleized pattern on a multi-layer tubular container
CA002214075A CA2214075C (fr) 1995-12-28 1996-12-26 Dispositif et procede de fabrication d'un recipient tubulaire
AU12090/97A AU721718B2 (en) 1995-12-28 1996-12-26 Method of producing tubular container and apparatus for producing the same
EP96943314A EP0812675B1 (fr) 1995-12-28 1996-12-26 Procede et appareil de fabrication d'un recipient tubulaire

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP7/343444 1995-12-28
JP34344495 1995-12-28
JP8/61254 1996-03-18
JP6125496 1996-03-18

Publications (1)

Publication Number Publication Date
WO1997024219A1 true WO1997024219A1 (fr) 1997-07-10

Family

ID=26402300

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP1996/003833 WO1997024219A1 (fr) 1995-12-28 1996-12-26 Procede et appareil de fabrication d'un recipient tubulaire

Country Status (10)

Country Link
US (1) US5980808A (fr)
EP (1) EP0812675B1 (fr)
JP (1) JP3992739B2 (fr)
KR (1) KR100473289B1 (fr)
CN (1) CN1069081C (fr)
AU (1) AU721718B2 (fr)
CA (1) CA2214075C (fr)
DE (1) DE69634356T2 (fr)
TW (1) TW348105B (fr)
WO (1) WO1997024219A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018229049A1 (fr) * 2017-06-16 2018-12-20 Plastic Omnium Advanced Innovation And Research Conduit pour réservoir à carburant de véhicule convenant pour la soudure

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1004429B1 (fr) * 1998-11-25 2005-03-16 Silgan Tubes Corporation Appareil et procédé pour la fabrication de tubes thermoplastiques
US6129880A (en) * 1998-11-25 2000-10-10 Thatcher Tubes Llc Method of forming a headed thermoplastic tube with a reusable closure in a single step
US7550105B2 (en) * 2005-02-23 2009-06-23 Access Business Group International Llc Apparatus and method for strengthening blow molded articles
KR100731594B1 (ko) * 2005-12-09 2007-06-25 한국에너지기술연구원 일단 폐쇄형 세라믹 기체분리막 튜브용 몰드 및 이를이용한 기체분리막 튜브 제조방법
KR100877741B1 (ko) * 2008-07-04 2009-01-08 홍성만 오일 링의 유로용 창절 가공장치
PL2623284T3 (pl) * 2012-02-01 2017-10-31 Lueers Maschinen Und Stahlbau Gmbh Sposób i urządzenie do nagrzewania odcinka końcowego rury z tworzywa sztucznego

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05131560A (ja) * 1990-09-12 1993-05-28 Courtaulds Packaging Inc ヘツド付熱可塑性チユーブの形成方法およびヘツド付熱可塑性チユーブ

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE523287A (fr) * 1952-10-21
NL236424A (fr) * 1958-02-25
US3226464A (en) * 1961-09-11 1965-12-28 Robert W Saumsiegle Method for making plastic containers
SE451969B (sv) * 1984-07-05 1987-11-09 Petainer Sa Sett att framstella en behallare fran ett rorformat och i botten tillslutet emne av orienterbart plastmaterial
JPS62500777A (ja) * 1984-09-28 1987-04-02 バクスター、インターナショナル、インコーポレイテッド 水蒸気滅菌し得る可撓性容器のためのポリオレフィンフィルム
DE3834648A1 (de) * 1988-10-11 1990-04-19 Alkor Gmbh Verfahren und vorrichtung zur herstellung von formteilen oder gegenstaenden fuer kraftfahrzeuge
US5069586A (en) * 1990-08-27 1991-12-03 Casey Marion B Self-locking two-part grommet
US5712009A (en) * 1993-09-16 1998-01-27 Owens-Illinois Plastic Products Inc. Coextruded multilayer plastic container utilizing post consumer plastic

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05131560A (ja) * 1990-09-12 1993-05-28 Courtaulds Packaging Inc ヘツド付熱可塑性チユーブの形成方法およびヘツド付熱可塑性チユーブ

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018229049A1 (fr) * 2017-06-16 2018-12-20 Plastic Omnium Advanced Innovation And Research Conduit pour réservoir à carburant de véhicule convenant pour la soudure
FR3067644A1 (fr) * 2017-06-16 2018-12-21 Plastic Omnium Advanced Innovation And Research Conduit pour reservoir a carburant de vehicule convenant pour la soudure.
US11623509B2 (en) 2017-06-16 2023-04-11 Plastic Omnium Advanced Innovation And Research Pipe for a vehicle fuel tank suitable for welding

Also Published As

Publication number Publication date
AU721718B2 (en) 2000-07-13
KR19980702573A (ko) 1998-07-15
EP0812675A4 (fr) 2001-11-14
CN1069081C (zh) 2001-08-01
DE69634356T2 (de) 2006-01-12
CN1175923A (zh) 1998-03-11
JP3992739B2 (ja) 2007-10-17
CA2214075C (fr) 2006-03-28
DE69634356D1 (de) 2005-03-24
US5980808A (en) 1999-11-09
AU1209097A (en) 1997-07-28
EP0812675A1 (fr) 1997-12-17
TW348105B (en) 1998-12-21
KR100473289B1 (ko) 2005-07-21
EP0812675B1 (fr) 2005-02-16
CA2214075A1 (fr) 1997-07-10

Similar Documents

Publication Publication Date Title
JP2922029B2 (ja) ヘッド付熱可塑性チューブの形成方法およびヘッド付熱可塑性チューブ
JPH079488A (ja) ラミネート加工したプレフォーム及びその成形方法及びプレフォームから成形される中間物品及び容器
EP1004515B1 (fr) Procédé pour former un tube thermoplastique avec une tête et une fermeture réutilisable
JP6923788B2 (ja) 積層剥離容器
JPS595035A (ja) 複層中空成形体の製造方法
JP7207460B2 (ja) 複合プリフォームおよびその製造方法ならびに複合容器およびその製造方法
WO1997024219A1 (fr) Procede et appareil de fabrication d'un recipient tubulaire
JP3820104B2 (ja) ライナおよびプリフォーム
US5203379A (en) Headed thermoplastic tube
JP3745897B2 (ja) 積層プリフォームとその成形方法
JPH0542944A (ja) ラベル付き絞り出し容器およびその製造方法
EP0069249A1 (fr) Récipient en forme de tube
JP2003165523A (ja) ブロー成形容器およびその製造方法ならびに多層押出し成形装置
EP0842755B1 (fr) Procede de traitement d'un contenant tubulaire et dispositif correspondant
JP2000226044A (ja) ブローチューブ容器
JPS6234535B2 (fr)
US6136247A (en) Method of forming a headed thermoplastic tube
JP3874056B2 (ja) チューブ状容器及びその成形方法
WO2020029078A1 (fr) Récipient stratifié séparable et son procédé de fabrication
MXPA99010857A (en) Method of forming a headed thermoplastic tube with a reusable closure
JPH01288422A (ja) 成形体
JPH11245312A (ja) チューブ容器の製造方法
JP2007253440A (ja) ブロー成形用金型およびブロー成形方法
JPH0569686B2 (fr)
JPH0524048A (ja) ラベル付容器の製造方法

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 96192112.9

Country of ref document: CN

AK Designated states

Kind code of ref document: A1

Designated state(s): AM AU BB BG BR BY CA CN CZ EE FI GE HU IS JP KG KR KZ LK LR LT LV MD MG MN MX NO NZ PL RO RU SG SI SK TJ TM TT UA US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

WWE Wipo information: entry into national phase

Ref document number: 08894713

Country of ref document: US

ENP Entry into the national phase

Ref document number: 2214075

Country of ref document: CA

Ref document number: 2214075

Country of ref document: CA

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 1996943314

Country of ref document: EP

Ref document number: 1019970705979

Country of ref document: KR

121 Ep: the epo has been informed by wipo that ep was designated in this application
WWP Wipo information: published in national office

Ref document number: 1996943314

Country of ref document: EP

WWP Wipo information: published in national office

Ref document number: 1019970705979

Country of ref document: KR

WWG Wipo information: grant in national office

Ref document number: 1019970705979

Country of ref document: KR

WWG Wipo information: grant in national office

Ref document number: 1996943314

Country of ref document: EP